Dyfyniad APA

Frank, R. (2007). Principles of economics-3rd ed (3rd.). Tata McGraw Hill.

Dyfyniad Arddull Chicago

Frank, Robert. Principles of Economics-3rd Ed. 3rd. New Delhi: Tata McGraw Hill, 2007.

Dyfyniad MLA

Frank, Robert. Principles of Economics-3rd Ed. 3rd. Tata McGraw Hill, 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.